Greater Scaup: This large diving duck has a glossy green-black head, white sides and belly, black tail, neck and breast, barred gray flanks and back. The eyes are yellow and the bill is blue-gray with a black tip. The diet includes aquatic insects and plants. It has a rapid direct flight with strong, quick wing beats. The female is dull brown with a white patch on the face at base of bill.

Common Merganser: Large, sleek diving duck with black upperparts and white underparts. Head and upper neck are green-black with head crest usually not visible. Long, thin bill is bright red. Wings are black with extensive white patches. Feeds on fish, mollusks, crustaceans, insects and plants.

Pacific Loon: This medium-sized loon has a black-and-white checkered back and white underparts. It has a gray crown and nape, red eyes and a slender black bill. Iridescent throat patch can appear purple, green or black. Feeds mostly on fish, some crustaceans and insects. Flight is direct with rapid wing beats. Sexes are similar.